Class: LcpRuby::Auth::CallbacksController

Inherits:
LcpRuby::ApplicationController show all
Includes:
Devise::Controllers::Helpers, BaseController
Defined in:
app/controllers/lcp_ruby/auth/callbacks_controller.rb

Overview

Receives the OIDC callback from OmniAuth, hands the auth_hash to UserResolver, and signs the user in via Warden. Routes are drawn in config/routes.rb behind ProviderRegistry.oidc_enabled?.

Constant Summary collapse

ALLOWED_FAILURE_REASONS = 
%w[
  invalid_credentials access_denied no_role_match host_rejected unknown_provider generic
].freeze
EXCEPTION_TO_REASON = 
{
  LcpRuby::Authentication::UnknownProvider => "unknown_provider",
  LcpRuby::Authentication::NoRoleMatch     => "no_role_match",
  LcpRuby::Authentication::HostRejected    => "host_rejected",
  LcpRuby::Authentication::InvalidClaims   => "invalid_credentials"
}.freeze

Constants included from Controller::BearerAuthentication

Controller::BearerAuthentication::BASIC_PREFIX_LENGTH, Controller::BearerAuthentication::BEARER_PREFIX_LENGTH

Instance Method Summary collapse

Methods included from Controller::Authorization

#current_evaluator

Instance Method Details

#callback ⇒ Object 



37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'app/controllers/lcp_ruby/auth/callbacks_controller.rb', line 37

def callback
  provider = LcpRuby::Authentication::ProviderRegistry.find(params[:provider])
  auth     = omniauth_auth

  unless auth
    Rails.logger.warn(
      "[lcp_ruby] OIDC callback missing omniauth.auth provider=#{params[:provider]} " \
      "request_id=#{request.request_id}"
    )
    redirect_to lcp_ruby.oidc_failure_path(reason: "invalid_credentials") and return
  end

  user = LcpRuby::Authentication::UserResolver.call(auth: auth, provider: provider)

  # Capture session state we want to preserve, then rotate the session
  # to prevent fixation: an attacker who planted a session cookie before
  # the OIDC round-trip must not retain that cookie post-login.
  return_to = safe_return_to(stored_location_for(:user))

  # id_token (a 3–4 KB JWT) is only needed at sign-out for RP-initiated
  # logout — stashing it for `logout.mode: local` would just bloat the
  # session and risk overflowing the 4 KB cookie store limit, with no
  # functional benefit. Skip the stash for local-logout providers.
  id_token = if provider.logout[:mode] == :rp_initiated
    auth.respond_to?(:credentials) && auth.credentials.respond_to?(:id_token) ?
      auth.credentials.id_token : nil
  end

  reset_session
  session[:oidc_id_token] = id_token if id_token

  (user, event: :authentication)
  redirect_to signed_in_redirect_path(return_to)
rescue *EXCEPTION_TO_REASON.keys => e
  if e.is_a?(LcpRuby::Authentication::InvalidClaims)
    Rails.logger.warn(
      "[lcp_ruby] OIDC invalid_claims provider=#{params[:provider]} " \
      "request_id=#{request.request_id}: #{e.message}"
    )
  end
  redirect_to lcp_ruby.oidc_failure_path(reason: EXCEPTION_TO_REASON.fetch(e.class))
end

#failure ⇒ Object 



80
81
82
83
84
85
86
87
88
89
90
91
 
# File 'app/controllers/lcp_ruby/auth/callbacks_controller.rb', line 80

def failure
  candidates = [ params[:reason].to_s, request.env["omniauth.error.type"]&.to_s ]
  @reason = candidates.find { |r| ALLOWED_FAILURE_REASONS.include?(r) } || "generic"
  @exception   = request.env["omniauth.error"]
  @request_id  = request.request_id
  provider_log = params[:provider] || request.env["omniauth.error.strategy"]&.name
  Rails.logger.warn(
    "[lcp_ruby] OIDC failure reason=#{@reason} provider=#{provider_log} " \
    "request_id=#{@request_id} exception=#{@exception&.class&.name}"
  )
  render "lcp_ruby/auth/callbacks/failure"
end

#passthru ⇒ Object 



30
31
32
33
34
35
 
# File 'app/controllers/lcp_ruby/auth/callbacks_controller.rb', line 30

def passthru
  # OmniAuth normally intercepts /auth/:provider during the request phase.
  # Reaching this action means the middleware was bypassed (misconfiguration
  # or an unknown provider).
  render plain: I18n.t("lcp_ruby.auth.failure.generic", default: "Not found"), status: :not_found
end